al2 
centrated mass containing from 80 to 90% of water; there is not as much 
odor to septic tank sludge as to the fresh sludge from the plain settling 
tanks. 
The above outlines the principal methods of sewage disposal. It must 
however be borne in mind that the proper method is wholly decided by 
local conditions. Care must be exercised in order that the various factors 
affecting the problem be carefully considered. 
A fuller realization of the sewage disposal problem is being evidenced 
throughout the country as the years go by, both by the state and health 
officers and city officials. The State has done a great deal of preliminary 
work in the way of sanitary surveys and this work should be heartily 
indorsed and commended. However, there is still much to be done, and 
Water Fowl! in Stream, Julietta, Ind., 100 Feet Below Sewage Plant. 
Photo taken 2 years after plant was installed. Formerly all waterfowl 
died from drinking water. 
undoubtedly some method of maintaining public control of the streams 
will have to be devised before the question of pollution can be properly 
taken care of. 
There are so many different factors entering into this question that 
the best solution can only be worked out with a proper organization which 
will take into Consideration every phase of the question and which can 
reach every district, affected, whether this territory be in ohne or more 
States. The state authorities should be given the power to pass upon 
every sewage disposal problem and they should have the proper means and 
support for doing this. 
